Medicare for All, including dental, optical, hearing aids and mental health services?

[Warren Stupidity]

34. Health insurance is 700B in a 17T economy.

Even assuming that the entire sector was wiped out tomorrow, which is not what would happen, that is not going to plunge the entire world into a permanent catastrophic depression. The big four control 86% of the sector and are already diversified and would continue to exist even within the sector, for example selling supplemental insurance or providing administrative services for government insurance programs. They certainly would not be raking in the huge profits they are taking today, but the economy would expand in other areas, like for example in health care services, a shift that would, to many people, seem to be a far better use of people than working on shifting funds from one account to another while rationing healthcare to assure that the owners of the fund shifting business rake in obscene profits.